refactor: Replace CLI execution flags with semantic-driven tool selection

- Remove --cli-execute flag from plan.md, tdd-plan.md, task-generate-agent.md, task-generate-tdd.md
- Remove --use-codex flag from test-gen.md, test-fix-gen.md, test-task-generate.md
- Remove meta.use_codex from task JSON schema in action-planning-agent.md and cli-planning-agent.md
- Add "Semantic CLI Tool Selection" section to action-planning-agent.md
- Document explicit source: metadata.task_description from context-package.json
- Update test-fix-agent.md execution mode documentation
- Update action-plan-verify.md to remove use_codex validation
- Sync SKILL reference copies via analyze_commands.py

CLI tool usage now determined semantically from user's task description
(e.g., "use Codex for implementation") instead of explicit flags.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/agents/cli-planning-agent.md

@@ -66,8 +66,7 @@ You are a specialized execution agent that bridges CLI analysis tools with task
   "task_config": {
     "agent": "@test-fix-agent",
     "type": "test-fix-iteration",
-    "max_iterations": 5,
-    "use_codex": false
+    "max_iterations": 5
   }
 }
 ```
@@ -263,7 +262,6 @@ function extractModificationPoints() {
     "analysis_report": ".process/iteration-{iteration}-analysis.md",
     "cli_output": ".process/iteration-{iteration}-cli-output.txt",
     "max_iterations": "{task_config.max_iterations}",
-    "use_codex": "{task_config.use_codex}",
     "parent_task": "{parent_task_id}",
     "created_by": "@cli-planning-agent",
     "created_at": "{timestamp}"